删除填充了Dictionary（Swift）的表格单元

Question

I'm trying to add functionality so the user can delete a table cell. However, this table cell is populated using a dictionary so I'm getting an error message: "cannot invoke 'removeAtIndex' with an argument list of type {index: Int)

Here's my code:

var titles = [Int: String]()


func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {

    if editingStyle == UITableViewCellEditingStyle.Delete {
        titles.removeAtIndex(index: indexPath.row)
        tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
    }
}

Answer 1

You need to call removeValueForKey method, because you use Int as keys. The

An you need to add beginUpdates and endUpdates method calls as well to perform the animations.

See the code below:

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {

    if editingStyle == UITableViewCellEditingStyle.Delete {
        table.beginUpdates()

        titles.removeValueForKey(index: indexPath.row)
        tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)

        table.endUpdates()
    }
}

Note: in such a case, consider using Array instead of Dictionary? You don't actually need dictionary since it will be indexed from row 0 to row count-1, right?